The user has to specify City, State (in US) and City, Country (for other countries)

It supports forecast for only 4 days.

It requires a Developer API key (details below)

Very Important!!!To use wunderground.com, you need to apply for a Developer API key. You can apply here. It has different pricing plans. The free version allows you only 500 calls per day.

The coding is still in progress. Will need a couple more days and probably roll out the new version this weekend.

Need to come up with the installers for all the different Joomla versions.

Need to add the language support. Yes, it supports foreign languages, but not as many as that from Google. You can see the entire list here: Language Support

Need testers to help test all the different Joomla versions and different languages

If you are interested to help with the testing of the new version, please send me an email or via the feedback form. Please let me know your email and your Joomla version so that I can send you the right installer.